Calculate the specific heat (J/g∘C) for a 13.5-g sample of zinc heated from 24.2 ∘C to 83.6 ∘C that absorbs 312 J of heat.

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

What is the correct lewis dot structure for arsenic?

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).